So I have been using Meshtastic for a bit over a month now, and I've been hearing about MeshCore, which sounds interesting, although it's much smaller. Tonight, I decided to give it a test, and while there's nobody around me who I can test with, my initial impressions of the firmware is that it's early, but good. With that said, from everything I can tell, the applications to control it from Android and iOS do not appear to be open source. And I absolutely refuse to become interested in something that is not open source. So that's a big no-no for me. If I am wrong, I would definitely be willing to try it again. But if I am right, the only way I would consider using it is if somebody else writes an app that is open source.